@for The @for directive repeatedly outputs a set of styles. For each repetition, a counter variable is used to adjust

selector_parse($selector) Parses a user-provided selector into a list of lists of strings as returned by &

green($color) Gets the green component of a color. Calculated from HSL where necessary via

unitless($number) Returns whether a number has units.

invert($color) Returns the inverse (negative) of a color. The red, green, and blue values are inverted, while the opacity

selector_extend($selector, $extendee, $extender) Returns a new version of $selector with $extendee

hue($color) Returns the hue component of a color. See

@while The @while directive takes a SassScript expression and repeatedly outputs the nested styles until the statement

mix($color1, $color2, $weight:50%) Mixes two colors together. Specifically, takes the average of each of the RGB components

counters($args...) This function only exists as a workaround for IE7‘s